fix decimal schema

Author: ymc9

packages/schema/src/plugins/zod/generator.ts

@@ -224,13 +224,14 @@ export class ZodSchemaGenerator {
     import { z } from 'zod';
     export const DecimalSchema = z.any().refine((val) => {
         if (typeof val === 'string' || typeof val === 'number') {
-            return val;
+            return true;
         }
         // Decimal.js shape
         if (typeof val === 'object' && val && Array.isArray(val.d) && typeof val.e === 'number' && typeof val.s === 'number') {
-            return val;
+            return true;
         }
-    });
+        return false;
+    }, { message: 'Not a valid Decimal value'});
     `,
                 { overwrite: true }
             )